junghans



6. JUNGHANS.

POCKET LAMP GENERATOR.

APPLICATION FILED OCT. 10. I916.

Patented May 6, 1919.

2 SHEETSSHEET l.-

, if: .2 jonffimh 0M4 0. TUNGH'ANS. POCKET LAMP GENERATOR. ARPLflCA'T-ION FILED OCT. 10, 1916.

Pmtented May 56, 1919 O SKAB JUNGHANS, OF SCHRAMBERG, GERMANY.

POCKET-LAMP GENERATOR.

Specification of Letters Patent.

Patented May 6. 1919.

Application area October 10, 1916. Serial No. 124,916.

magnet is combined with plates to constitute the casing of the device. The plates act to support the moving parts independently of the magnet, whereby no adjustments between the magnet and working arts carried by the plates are necessary. he magnets, being of hardened steel, are difficult to make of uniform dimensions.

In the accompanying drawing a constructional form of the lamp accordi to the present. invention has been exemp ified in Figures 1 to 6.

In said drawings,-

Fig. 1 is a cross-section of the lamp Figs. 2 and 3 are plan views (from oppd site sides) of the-lamp;

Fig. 4 is a partial longitudinal sectional view at the po 0 end of the lamp;

Big. 5 is a perspective view of the plates whlch carry the working parts and form the Bi-casing with the magnet;

Fig. 6 is a perspective view of the magnet.

As may be seen in particular in the vertlcal. cross section Fig. 1 a separate body frame g, i is arranged between the branches of the magnet m; in this frame the whole gearing is, similarly to a clock work, journaled together with the operating lever and the armature. This body frame is composed essentially of the two face plates 9, 2', and is covered at the top and the sides by the magnet yoke, so that the said frame with the .parts fitted thereto may be readily fitted as 'one piece between the branches of the magnet. \Vith the constructional form shown 1n the accompanying drawings the frame maybe nserted into the magrietfrom above, owing to the upper plate 2' being made so wide that it overlaps the edges of the magnet branches, while thelower plate 9 is a 56 little narrower than the distance between said magnet branches. F or insuring a close cover a separate cover plate h is provided on the narrow plate 9, and screwed thereto.

and overlapping the branches of the magnet. In consequence of this arrangement it is possible to assemble the whole gearing together with the armature outside of the magnet and subsequently fit it into the magnet. As hereinbefore stated the frame is,

when thus fitted into the magnet, encircled and closed at the top (where the bulb is attached) and at the two sides, by the magnet and thus covered. Below the frame is closed by means of a fitting I) made of some non-magnetic material, such as zinc or brass, which is screwed to the plates g,'z' and has the object of insuring the proper distance of the pole shoes m Ifthe magnet is left to itself, this distance between the pole shoes will differ frequently; by the fitting 1), however, the poleshoes are held at the proper distance, so that the said fitting serves both as a spacing member and as a cover for the magnet yoke and the frame, so that the ap-- paratus which has been assembled by fitting the frame into the magnet forms one compact bod closed on all sides and of a convenient, iandy shape.

In the embodiment shown in the drawings the said fitting b is formed with bearing surfaces b against which bear the pole ends, while the two wings b of said fitting overlap the pole shoes on the outside, where they art screwed to the magnet. a

As shownin Fig. 2 the upper plate, which bearing holes are formed in a piece of iron 1' laid along themiddle line of thisplate, which piece of iron is, in its details made the same as the bushes employed in the previous constructions of the apparatus. On the same middle line is provided at the top a hole, which registers with a hole in the fitting b, and is adapted to reciye a screw 0 screwing into the latter whereby the hearing of the armature which, as said before, is likewise on the said middle line, is fixed in a Ion 'tudinal direction. For securing the position of said bearing also laterally, the plate is provided at e and c with curved pbo1ections, the curves of which are part of a circle havingits center on the same central line of the plate. In wholesale manufacture the magnet is firstrbent, so that it has the shape shown in the dravQng (Fig. 6).

is made of zinc, has a peculiar shape. All

Then the fitting b (Fig. 4) is screwed to the magnet and the circle enveloping, the armature is ground out to the diameter 9 (Fig. 4). The magnet is thereupon again ground out to a circular curve at a given distance from the center of the diameter f so as to correspond with the projections 6. It it a simple matter to insure that the center of the ground circle of the diameter f and the center of the ground out circle at the diameter e are at a given distance from each other. When, thereafter, the gearing is'fitted into the magnet, it is obvious that not only such gearing, but in particular the .armature is secured in their position by the three points 0, e, and 6}, so that the gap between the armatureand the poles of the magnet must be even all over and the limits may be reduced. y

The construction of the lamp described hereinbefore therefore affords the following advantages:

1. The magnet and the body frame with the works may be manufactured separately and be subsequently assembled without any further fitting being necessary.

2. The position of the armature relatively to the magnet is fixed in such a manner, that the gap between the armature and the poles of the magnet may be made of the smallest possible size.

As, now, it is no more necessary for the magnet to receive any pins or screws for securing the side plates, the edges of the magnet may be well rounded off, and this will render the holding of the lamp more agreeable to the hand of the user. By the armature being approached to the magnet, it is, furthermore, possible to obtain such electric force that even at a single pressure on the operating lever, the lamp will light up satisfactorily for-several seconds. By the employment hereinbefore described arrangement, by which the center of the armature is fundamentally assured, it willbe possible to reduce, with increasing experience in manufacture, the gap between armature and magnet to but a few tenths, and thereby considerably increase the efficiency of the lamp.

I claim:

1. A hand generator consisting of two parts, one of said parts comprising an ararmature and driving gear therefor, the other part comprising a magnet, the said two parts being constructed to be fitted as a unit one within the other to form a unitary closed structure.

2. A hand generator consisting of two parts, one of said parts comprising an ar-' ing the space between the ends of the magnet, the said two parts being constructed to be fitted as a unitone within the other to form a unitary closed structure.

3. A hand generator consisting of two parts, one of said parts comprising an armature and driving gear therefor, the other part comprising a magnet and a part attached thereto for holding the poles of the magnet a constant distance apart, and closing the space between the ends of the magnet, the said two parts being constructed to be fitted as a unit one within the other to form a unitary closed structure, said firstnamed part further comprising two side plates fixed in spaced relation to one another, and between which the armature and gears are arranged, and said side plates having corresponding bearing plates fixed thereto, the bearings for-the rotatable parts being carried by said bearing plates.

4:. A hand generator consisting of two parts, one of said parts-comprising an armature and driving gear therefor, the other part comprising a magnet and a part-attached thereto for holding'the poles of the magnet a constant distance-apart,- and closing the space between the ends 'of the magnet, the said two parts being constructed to be fitted as a unit one within the other to form a unitary closed structure, said firstnamed part further comprising two side plates fixed in spaced relation to one another, and between which the armature and gears are arranged, and said side plates having corresponding bearing plates fixed thereto, the bearings for the rotatable parts being carried by said bearing plates, said magnet having a lamp mounting thereon.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

osKAR JUNG'HANS.

Witnesses:

FRIDA KLEIBER, CONRAD HAUP. v 

